<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    
  <el-header>
    <div>
      <img src="" alt="">
 <span>
      电商后台管理系统
    </span>
    </div>
   
    <el-button type="info" @click="logout">退出</el-button>
    </el-header>
  <!-- 页面主题区域 -->
  <el-container>
    <!-- 侧边栏 -->
    <el-aside :width="isCollapse ? '64px' : '200px' ">
      <div class="toggle-button" @click="toggleCollapse">❤❤❤</div>
      <!-- 侧边栏菜单区域 -->
      <el-menu
      class="el-menu-vertical-demo"
     
      background-color="#333744"
      text-color="#fff"
      active-text-color="#409EFF" unique-opened :collapse="isCollapse" :collapse-transition="false"
      router :default-active="activePath"> 
      <!-- 一级菜单 -->
      <el-submenu :index="item.id+''" :key='item.id' v-for="item in menulist">
        <!-- 一级菜单的模板区域 -->
        <template slot="title">
          <!-- 图标 -->
          <i :class=" iconsObj[item.id]"></i>
          <!-- 文本 -->
          <span>{{item.authName}}</span>
        </template>
        <!-- 二级菜单 -->
         <el-menu-item :index=" '/'+subItem.path" v-for="subItem in item.children" 
         :key="subItem.id" @click="saveNavState('/'+subItem.path)">
           <template slot="title"  >
          <!-- 图标 -->
          <i class="el-icon-menu"></i>
          <!-- 文本 -->
          <span>{{subItem.authName}}</span>
        </template></el-menu-item>
      
      </el-submenu>

    </el-menu>

    </el-aside>
    <!-- 右侧主体区域 -->
    <el-main>
      <!-- 路由占位符 -->
      <router-view></router-view>
    </el-main>
  </el-container>
</el-container>
</template>

<script>

export default {
  data(){
    return{
      // 左侧菜单数据
      menulist:[],
iconsObj:{
  '125':'iconfont icon-user',
  '103':'iconfont icon-tijikongjian',
  '101':'iconfont icon-shangpin',
  '102':'iconfont icon-danju',
  '145':'iconfont icon-baobiao'
},
// 是否折叠
isCollapse:false,
// 默认为false，因为菜单默认就是展开的，不是折叠的
// 被激活的链接地址
activePath:''
    }
  },
  created(){
this.getMenuList()
  },
 methods:{
   logout(){
    //  清空token
     window.sessionStorage.clear()
    //  跳转到登录页
     this.$router.push('/login')
   },
   async getMenuList(){
     const{data:res}=await this.$http.get('menus')
     if(res.meta.status!==200)return this.$message.error(res,meta,msg)
     this.menulist=res.data
     console.log(res);
   },
  //  点击按钮，切换菜单的折叠与展开
   toggleCollapse(){
this.isCollapse=!this.isCollapse
   },
  //  保持链接的激活状态
  
saveNavState(activePath){
  window.sessionStorage.setItem('activePath',activePath)
  this.activePath=activePath
}
 }
 
}
</script>
<style lang="less" scoped>
.el-header{
  background-color: #373d41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #fff;
  font-size: 20px;
  >div{
    display: flex;
    align-items: center;
    margin-left: 15px;
  }
}
.el-aside{
  background: #333744;
  .el-menu{
  border-right:none;
}
}
.el-main{
  background-color: #eaedf1;
}

.home-container{
height: 100%;
}
.iconfont{
  margin-right:10px
}
.toggle-button{
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color:#fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
